Orbital order and possible superconductivity in LaNiO3/LaMO3 superlattices

被引：347

作者：

Chaloupka, Jiri ^{[1
,2
]}

Khaliullin, Giniyat ^{[1
]}

机构：

[1] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

[2] Masaryk Univ, Inst Condensed Matter Phys, CS-61137 Brno, Czech Republic

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.100.016404

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A hypothetical layered oxide La2NiMO6 where NiO2 and MO2 planes alternate along the c axis of ABO(3) perovskite lattice is considered theoretically. Here, M denotes a trivalent cation Al, Ga,... such that MO2 planes are insulating and suppress the c-axis charge transfer. We predict that correlated e(g) electrons in the NiO2 planes develop a planar x(2)-y(2) orbital order driven by the reduced dimensionality and further supported by epitaxial strain from the substrate. Low-energy electronic states can be mapped to a single-band t-t(')-J model, suggesting favorable conditions for high-T-c superconductivity.

引用

页数：4

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